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Forum: OpenFOAM Programming & Development

January 31, 2011, 05:19

Replies: 9

Source Term on Scalar Transport Equation

Views: 4,913

Posted By santos

Actually I have used in the past a 'quick and...

Actually I have used in the past a 'quick and dirty' trick that allows you to do just that:
sourceTerm = (1-C)*C*runTime.deltaT().value()/runTime.deltaT();

Therefore, you get the correct...

Forum: OpenFOAM Programming & Development

January 31, 2011, 04:52

Replies: 9

Source Term on Scalar Transport Equation

Views: 4,913

Posted By santos

Hi, I am not sure you can include your...

Hi,

I am not sure you can include your source term like that, ddt should be in the form ddt(C) or ddt(rho,C).

If you need: (C*(1-C))/dt, then try:

solve
(
fvm::ddt(C)
+fvm::div(phi, C)

Forum: OpenFOAM Programming & Development

January 28, 2011, 05:56

Replies: 9

Source Term on Scalar Transport Equation

Views: 4,913

Posted By santos

Alex, k is a placeholder for the constants...

Alex,

k is a placeholder for the constants that are multiplied by C in your source term.

Hence, if your source term is 2*C, it is defined implicitly as: fvm::Sp(2,C). The Programmers Guide that...

Forum: OpenFOAM Programming & Development

January 28, 2011, 05:20

Replies: 9

Source Term on Scalar Transport Equation

Views: 4,913

Posted By santos

Hi, You can just include your source term as...

Hi,

You can just include your source term as 'C*(1-C)' in the Ceqn.H equation. In this way it will be defined explicitly. I am not sure if you can work out the dimensions of this source term so it...

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